16569 + Interview Questions in Physics

1.	What is the power of the eye lens of a normal adult?
Answer» What is the power of the eye lens of a normal adult?

Discussion

2.	If a bag of rice weighs 30 kg on Earth, what is the weight of the rice bag on the planet Neptune? Take the mass of Neptune to be 1026 kg, and its radius to be 25×106 m.
Answer» If a bag of rice weighs $30 kg$ on Earth, what is the weight of the rice bag on the planet Neptune? Take the mass of Neptune to be $10^{26} kg$ , and its radius to be $25 \times 10^{6} m$ .

Discussion

3.	If focal length increases then does our reading power increase or decrease?
Answer» If focal length increases then does our reading power increase or decrease?

Discussion

4.	A square plate of edge a/2 is cut out from a uniform square plate of edge a as shown in the figure. The mass of the remaining portion is M . The moment of inertia of the shaded portion about an axis passing through O (centre of the square of side a ) and perpendicular to plane of the plate is
Answer» A square plate of edge $a / 2$ is cut out from a uniform square plate of edge $a$ as shown in the figure. The mass of the remaining portion is $M$ . The moment of inertia of the shaded portion about an axis passing through $O$ (centre of the square of side $a$ ) and perpendicular to plane of the plate is

Discussion

5.	43 What are ionisable and non-ionisable valancies?
Answer» 43 What are ionisable and non-ionisable valancies?

Discussion

6.	when a light ray enters a refracting medium ,it is found that magnitude of the angle of refraction is equal to half the angle of reflection.if n is the refractive index of the medium ,find the angle of incidence.why is the refractive index of medium 1 taken as 1 here?
Answer» when a light ray enters a refracting medium ,it is found that magnitude of the angle of refraction is equal to half the angle of reflection.if n is the refractive index of the medium ,find the angle of incidence.why is the refractive index of medium 1 taken as 1 here?

Discussion

7.	(a) For which position of an object, a real, diminished image is formed by a convex lens?(b) Two convex lenses A and B have focal lengths of 2.5 cm and 12.0 cm, respectively. Which lens has a greater power?(c) Describe with the help of a labelled ray-diagram, the formation of image when an object is placed in the front of a convex lens between focus and optical centre. State any two characteristics of the image formed.
Answer» (a) For which position of an object, a real, diminished image is formed by a convex lens? (b) Two convex lenses A and B have focal lengths of 2.5 cm and 12.0 cm, respectively. Which lens has a greater power? (c) Describe with the help of a labelled ray-diagram, the formation of image when an object is placed in the front of a convex lens between focus and optical centre. State any two characteristics of the image formed.

Discussion

8.	Which has more polarising power ZnCl2, CdCl2 or HgCl2?
Answer» Which has more polarising power ZnCl2, CdCl2 or HgCl2?

Discussion

9.	Which of the following statements is not correct about periodic and oscillatory motion?
Answer» Which of the following statements is not correct about periodic and oscillatory motion?

Discussion

10.	Deffrentiate alpha decay,gamma decay,beta decay
Answer» Deffrentiate alpha decay,gamma decay,beta decay

Discussion

11.	A student is asked to connect 12 cells each of emf 2 V and internal resistance 0.25 Ω in series with an external resistance of 3 Ω but few cells are connected wrongly by him with its terminal reversed. If the current in the circuit is 2 A then the number of cells connected wrongly is-
Answer» A student is asked to connect $12$ cells each of emf $2 V$ and internal resistance $0.25 Ω$ in series with an external resistance of $3 Ω$ but few cells are connected wrongly by him with its terminal reversed. If the current in the circuit is $2 A$ then the number of cells connected wrongly is-

Discussion

12.	The recommended fan-out for a TTL gate is ___.10
Answer» The recommended fan-out for a TTL gate is ___. 10

Discussion

13.	When iron filings are spread on a piece of paper and a bar magnet is kept below the paper, the filings ___.
Answer» When iron filings are spread on a piece of paper and a bar magnet is kept below the paper, the filings ___.

Discussion

14.	What is meant by scattering of light ?
Answer» What is meant by scattering of light ?

Discussion

15.	Consider the beam ABCD shown in the figure. AB = BC = 4m CD = 10 mFor a moving concentrated load of 50 kN on the beam, the magnitude of the maximum bending moment (in kN-m) obtained at the support C will be equal to ______200
Answer» Consider the beam ABCD shown in the figure. AB = BC = 4m CD = 10 m For a moving concentrated load of 50 kN on the beam, the magnitude of the maximum bending moment (in kN-m) obtained at the support C will be equal to ______ 200

Discussion

16.	61.What is magnetic field at the center of regular polygon of 'n' sides which is formed by a constant length wire , which carries current I and side of polygon is 'A'?
Answer» 61.What is magnetic field at the center of regular polygon of 'n' sides which is formed by a constant length wire , which carries current I and side of polygon is 'A'?

Discussion

17.	obtain the mirror formula for concave mirror when object is placed at center of curvature
Answer» obtain the mirror formula for concave mirror when object is placed at center of curvature

Discussion

18.	The major component of biogas is: (a) hydrogen (b) butane (c) hydrogen sulphide (d) methane
Answer» The major component of biogas is: (a) hydrogen (b) butane (c) hydrogen sulphide (d) methane

Discussion

19.	The potential at a point is 20 V. The work done in bringing a charge of 0.5 C from infinity to this point will be -
Answer» The potential at a point is $20 V$ . The work done in bringing a charge of $0.5 C$ from infinity to this point will be -

Discussion

20.	62. A copper ball of mass 100 gm is at a temperature T. It is dropped in a copper calorimeter of mass 100 gm, filled with 170 gm of water at room temperature. Subsequently, the temperature of the system is found to be 75^°C. T is given by : (Given : room temperature = 30^° C, specific heat of copper = 0.1 cal/gm^°C (1) 1250^°C (2) 825^°C (3) 800^°C (4) 885^° C
Answer» 62. A copper ball of mass 100 gm is at a temperature T. It is dropped in a copper calorimeter of mass 100 gm, filled with 170 gm of water at room temperature. Subsequently, the temperature of the system is found to be 75^°C. T is given by : (Given : room temperature = 30^° C, specific heat of copper = 0.1 cal/gm^°C (1) 1250^°C (2) 825^°C (3) 800^°C (4) 885^° C

Discussion

21.	Mirage in a desert is formed due to __________.
Answer» Mirage in a desert is formed due to __________.

Discussion

22.	What is x-ray?
Answer» What is x-ray?

Discussion

23.	If you are standing between 2 mirrors and you see 3 images of yourself then, find out the angle at which these mirrors are inclined to each other?
Answer» If you are standing between 2 mirrors and you see 3 images of yourself then, find out the angle at which these mirrors are inclined to each other?

Discussion

24.	A solid sphere rolls (without slipping) down a plane inclined at 30o to the horizontal. The distance traveled in √7 seconds after starting from rest is (g = 10 ms-2)
Answer» A solid sphere rolls (without slipping) down a plane inclined at 30^o to the horizontal. The distance traveled in √7 seconds after starting from rest is (g = 10 ms^-2)

Discussion

25.	Question 1In which of the three media, air, water or iron, does sound travel the fastest at a particular temperature?
Answer» Question 1 In which of the three media, air, water or iron, does sound travel the fastest at a particular temperature?

Discussion

26.	A circular flexible current loop of radius R carrying current i is placed in an inward magnetic field B. If we spin the loop clockwise with angular speed ω, then tension in string (Assume the mass of the loop is m)
Answer» A circular flexible current loop of radius R carrying current i is placed in an inward magnetic field B. If we spin the loop clockwise with angular speed ω, then tension in string (Assume the mass of the loop is m)

Discussion

27.	Differentiate between refraction through a rectangular glass slab and refraction through a prism.
Answer» Differentiate between refraction through a rectangular glass slab and refraction through a prism.

Discussion

28.	The given figure shows a coil connected to a centre zero galvanometer G. The galvanometer shows a deflection to the right when the N-pole of a powerful magnet is moved to the right as shown. The deflection occurs in the galvanometer because of:
Answer» The given figure shows a coil connected to a centre zero galvanometer G. The galvanometer shows a deflection to the right when the N-pole of a powerful magnet is moved to the right as shown. The deflection occurs in the galvanometer because of:

28.

The given figure shows a coil connected to a centre zero galvanometer G. The galvanometer shows a deflection to the right when the N-pole of a powerful magnet is moved to the right as shown. The deflection occurs in the galvanometer because of:

Answer»

The given figure shows a coil connected to a centre zero galvanometer G. The galvanometer shows a deflection to the right when the N-pole of a powerful magnet is moved to the right as shown.

The deflection occurs in the galvanometer because of:

Discussion

29.	Give your opinion about the radius of curvature of a convex lens having different focal lengths F1 and F2 ? What would the lens called have an equal focal length?
Answer» Give your opinion about the radius of curvature of a convex lens having different focal lengths $F_{1}$ and $F_{2}$ ? What would the lens called have an equal focal length?

Discussion

30.	An object is placed 15 cm from a thin convex lens on its principle axis and a virtual image of certain size is formed. Now the object is moved 10 cm away from the lens and real image of the same size as that of the previous) virtual image is formed. The focal length (in cm) of the lens is .
Answer» An object is placed $15 cm$ from a thin convex lens on its principle axis and a virtual image of certain size is formed. Now the object is moved $10 cm$ away from the lens and real image of the same size as that of the previous) virtual image is formed. The focal length (in cm) of the lens is .

Discussion

31.	Vitamin D in plants are produced by which ray in Electromagnetic Spectrum?
Answer» Vitamin D in plants are produced by which ray in Electromagnetic Spectrum?

Discussion

32.	Name a source of fresh water. [1 MARK]
Answer» Name a source of fresh water. [1 MARK]

Discussion

33.	A block is projected along a rough horizontal road with a velocity of 10 m/s. If the coefficient of kinetic friction is 0.1, how far will it travel before coming to rest?
Answer» A block is projected along a rough horizontal road with a velocity of 10 m/s. If the coefficient of kinetic friction is 0.1, how far will it travel before coming to rest?

Discussion

34.	25. 2 objects of moment of inertia i1 and i2 having same rotational angular momentum which one will have greater kinetic energy?
Answer» 25. 2 objects of moment of inertia i1 and i2 having same rotational angular momentum which one will have greater kinetic energy?

Discussion

35.	the speed (v) of ripple on the surface of water depends upon the surface tension(s),density(d) and wavelength (lambda).The speed v is proportional to ?
Answer» the speed (v) of ripple on the surface of water depends upon the surface tension(s),density(d) and wavelength (lambda).The speed v is proportional to ?

Discussion

36.	Three long wire of resistance in the ratio 3:4:5 are connected parallel to each other as shown in figure. If net force on the middle wire is zero. Then the ratio of the distance i.e, d1:d2 will be
Answer» Three long wire of resistance in the ratio $3 : 4 : 5$ are connected parallel to each other as shown in figure. If net force on the middle wire is zero. Then the ratio of the distance i.e, $d_{1} : d_{2}$ will be

Discussion

37.	A ray of light enters a rectangular glass slab of refractive index √3 at an angle of incidence 60∘. It travels a distance of 5 cm inside the slab and emerges out of slab. The perpendicular distance between the incident ray and the emergent ray is
Answer» A ray of light enters a rectangular glass slab of refractive index $\sqrt{3}$ at an angle of incidence $60^{\circ} .$ It travels a distance of 5 cm inside the slab and emerges out of slab. The perpendicular distance between the incident ray and the emergent ray is

Discussion

38.	A wooden block of mass 10 g is dropped from the top of a cliff 100 m high. Simultaneously, a bullet of mass 10 g is fired from the foot of the cliff upward with a velocity of 100 ms−1. At what time will the bullet and the block meet ? Also, where was the block with respect to the top of cliff when they met?
Answer» A wooden block of mass 10 g is dropped from the top of a cliff 100 m high. Simultaneously, a bullet of mass 10 g is fired from the foot of the cliff upward with a velocity of $100 m s^{- 1}$ . At what time will the bullet and the block meet ? Also, where was the block with respect to the top of cliff when they met?

Discussion

39.	Explain why the mechanical advantage of a class II lever is always more than 1.
Answer» Explain why the mechanical advantage of a class II lever is always more than 1.

Discussion

40.	Two fixed charges A and B of 5 uC each are separated by adistance of 6 m. C is the mid point of the line joining A andB. A charge 'Q of -5AC is shot perpendicular to the linejoining A and B through C with a kinetic energy of 0.06 J.The charge 'Q' comes to rest at a point D. The distance CDis(a) 3m\lbrack KCET 2012\rbrack(b) 3 m(d) 4 m(c) 3/3 m
Answer» Two fixed charges A and B of 5 uC each are separated by adistance of 6 m. C is the mid point of the line joining A andB. A charge 'Q of -5AC is shot perpendicular to the linejoining A and B through C with a kinetic energy of 0.06 J.The charge 'Q' comes to rest at a point D. The distance CDis(a) 3m\lbrack KCET 2012\rbrack(b) 3 m(d) 4 m(c) 3/3 m

Discussion

41.	A woman bends over me, Searching my reaches for what she really is. Then she turns to those liars, the candles or the moon. Why does she turn to them in spite of calling them 'liars'? i. the reality is too harsh for her to bear ii. she is desperately looking for someone to comfort her iii. she wants to be told that she is still beautiful iv. she can hide her signs of graying in their light
Answer» A woman bends over me, Searching my reaches for what she really is. Then she turns to those liars, the candles or the moon. Why does she turn to them in spite of calling them 'liars'? i. the reality is too harsh for her to bear ii. she is desperately looking for someone to comfort her iii. she wants to be told that she is still beautiful iv. she can hide her signs of graying in their light

41.

A woman bends over me, Searching my reaches for what she really is. Then she turns to those liars, the candles or the moon. Why does she turn to them in spite of calling them 'liars'? i. the reality is too harsh for her to bear ii. she is desperately looking for someone to comfort her iii. she wants to be told that she is still beautiful iv. she can hide her signs of graying in their light

Answer»

A
woman bends over me,

Searching
my reaches for what she really is.

Then
she turns to those liars, the candles or the moon.

Why
does she turn to them in spite of calling them 'liars'?

i.
the reality is too harsh for her to bear

ii.
she is desperately looking for someone to comfort her

iii.
she wants to be told
that
she is still beautiful

iv.
she can hide her signs of graying in their light

Discussion

42.	the electric field in an electromagnetic wave was found to oscillate with an amplitude of 36v/m. the amplitude of the oscillating magnetic field is
Answer» the electric field in an electromagnetic wave was found to oscillate with an amplitude of 36v/m. the amplitude of the oscillating magnetic field is

Discussion

43.	Explain direct and alternating current. [3 MARKS]
Answer» Explain direct and alternating current. [3 MARKS]

Discussion

44.	inSelf inductance and mutual inductance:An e.m.f of 5volt is produced by a selfInductance, when the current changes at a steadyrate from 3A to 2A in 1 millisecond. The value ofself inductance is3) 5000H 4) 5 mH7E1) Zero2) 5H
Answer» inSelf inductance and mutual inductance:An e.m.f of 5volt is produced by a selfInductance, when the current changes at a steadyrate from 3A to 2A in 1 millisecond. The value ofself inductance is3) 5000H 4) 5 mH7E1) Zero2) 5H

Discussion

45.	A hydrogen atom moves with a velocity u, and makes a head on perfectly inelastic collision with another stationary hydrogen atom. Both the hydrogen atom are in the ground state before collision. What is the minimum value of u, if one of them is to be given a minimum excitation energy?The ionization energy of hydrogen atom is 13.6 eV. Mass of the hydrogen atom is 1.67×10−27 kg.
Answer» A hydrogen atom moves with a velocity $u$ , and makes a head on perfectly inelastic collision with another stationary hydrogen atom. Both the hydrogen atom are in the ground state before collision. What is the minimum value of $u$ , if one of them is to be given a minimum excitation energy? The ionization energy of hydrogen atom is $13.6 eV$ . Mass of the hydrogen atom is $1.67 \times 10^{- 27} kg$ .

Discussion

46.	A sparrow flying in the air sits on a stretched telegraph wire. If weight-of the sparrow is W which of the following is -true about the additional tension T produced in the wire(A) T-O C)T w(B) T =. W.(D)T > W
Answer» A sparrow flying in the air sits on a stretched telegraph wire. If weight-of the sparrow is W which of the following is -true about the additional tension T produced in the wire(A) T-O C)T w(B) T =. W.(D)T > W

Discussion

47.	Why are MCBs used in place of ceramic fuses nowadays?
Answer» Why are MCBs used in place of ceramic fuses nowadays?

Discussion

48.	Question 10 How many 176Ω resistors (in parallel) are required to carry 5 A on a 220 V line?
Answer» Question 10 How many $176 Ω$ resistors (in parallel) are required to carry 5 A on a 220 V line?

Discussion

49.	21.A particle of mass 100 g is thrown verticallyupwards with a speed of 5 m/s, the work doneby the force of gravity during the time theparticle goes up is(A.I.E.E.E. 2006)(1)(2)-0.5 J(3)0.5J- 1.25 J1.25 J(4)
Answer» 21.A particle of mass 100 g is thrown verticallyupwards with a speed of 5 m/s, the work doneby the force of gravity during the time theparticle goes up is(A.I.E.E.E. 2006)(1)(2)-0.5 J(3)0.5J- 1.25 J1.25 J(4)

Discussion

50.	In the second stanza why has the narrator replaced the mirror with a lake? What is he/she trying to focus on?
Answer» In the second stanza why has the narrator replaced the mirror with a lake? What is he/she trying to focus on?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

What is the power of the eye lens of a normal adult?

If a bag of rice weighs 30 kg on Earth, what is the weight of the rice bag on the planet Neptune? Take the mass of Neptune to be 1026 kg, and its radius to be 25×106 m.

If focal length increases then does our reading power increase or decrease?

A square plate of edge a/2 is cut out from a uniform square plate of edge a as shown in the figure. The mass of the remaining portion is M . The moment of inertia of the shaded portion about an axis passing through O (centre of the square of side a ) and perpendicular to plane of the plate is

43 What are ionisable and non-ionisable valancies?

when a light ray enters a refracting medium ,it is found that magnitude of the angle of refraction is equal to half the angle of reflection.if n is the refractive index of the medium ,find the angle of incidence.why is the refractive index of medium 1 taken as 1 here?

Which has more polarising power ZnCl2, CdCl2 or HgCl2?

Which of the following statements is not correct about periodic and oscillatory motion?

Deffrentiate alpha decay,gamma decay,beta decay

A student is asked to connect 12 cells each of emf 2 V and internal resistance 0.25 Ω in series with an external resistance of 3 Ω but few cells are connected wrongly by him with its terminal reversed. If the current in the circuit is 2 A then the number of cells connected wrongly is-

The recommended fan-out for a TTL gate is ___.10

When iron filings are spread on a piece of paper and a bar magnet is kept below the paper, the filings ___.

What is meant by scattering of light ?

Consider the beam ABCD shown in the figure. AB = BC = 4m CD = 10 mFor a moving concentrated load of 50 kN on the beam, the magnitude of the maximum bending moment (in kN-m) obtained at the support C will be equal to ______200

61.What is magnetic field at the center of regular polygon of 'n' sides which is formed by a constant length wire , which carries current I and side of polygon is 'A'?

obtain the mirror formula for concave mirror when object is placed at center of curvature

The major component of biogas is: (a) hydrogen (b) butane (c) hydrogen sulphide (d) methane

The potential at a point is 20 V. The work done in bringing a charge of 0.5 C from infinity to this point will be -

Mirage in a desert is formed due to __________.

What is x-ray?

If you are standing between 2 mirrors and you see 3 images of yourself then, find out the angle at which these mirrors are inclined to each other?

A solid sphere rolls (without slipping) down a plane inclined at 30o to the horizontal. The distance traveled in √7 seconds after starting from rest is (g = 10 ms-2)

Question 1In which of the three media, air, water or iron, does sound travel the fastest at a particular temperature?

A circular flexible current loop of radius R carrying current i is placed in an inward magnetic field B. If we spin the loop clockwise with angular speed ω, then tension in string (Assume the mass of the loop is m)

Differentiate between refraction through a rectangular glass slab and refraction through a prism.

The given figure shows a coil connected to a centre zero galvanometer G. The galvanometer shows a deflection to the right when the N-pole of a powerful magnet is moved to the right as shown. The deflection occurs in the galvanometer because of:

Give your opinion about the radius of curvature of a convex lens having different focal lengths F1 and F2 ? What would the lens called have an equal focal length?

An object is placed 15 cm from a thin convex lens on its principle axis and a virtual image of certain size is formed. Now the object is moved 10 cm away from the lens and real image of the same size as that of the previous) virtual image is formed. The focal length (in cm) of the lens is .

Vitamin D in plants are produced by which ray in Electromagnetic Spectrum?

Name a source of fresh water. [1 MARK]

A block is projected along a rough horizontal road with a velocity of 10 m/s. If the coefficient of kinetic friction is 0.1, how far will it travel before coming to rest?

25. 2 objects of moment of inertia i1 and i2 having same rotational angular momentum which one will have greater kinetic energy?

the speed (v) of ripple on the surface of water depends upon the surface tension(s),density(d) and wavelength (lambda).The speed v is proportional to ?

Three long wire of resistance in the ratio 3:4:5 are connected parallel to each other as shown in figure. If net force on the middle wire is zero. Then the ratio of the distance i.e, d1:d2 will be

A ray of light enters a rectangular glass slab of refractive index √3 at an angle of incidence 60∘. It travels a distance of 5 cm inside the slab and emerges out of slab. The perpendicular distance between the incident ray and the emergent ray is

Explain why the mechanical advantage of a class II lever is always more than 1.

the electric field in an electromagnetic wave was found to oscillate with an amplitude of 36v/m. the amplitude of the oscillating magnetic field is

Explain direct and alternating current. [3 MARKS]

inSelf inductance and mutual inductance:An e.m.f of 5volt is produced by a selfInductance, when the current changes at a steadyrate from 3A to 2A in 1 millisecond. The value ofself inductance is3) 5000H 4) 5 mH7E1) Zero2) 5H

A sparrow flying in the air sits on a stretched telegraph wire. If weight-of the sparrow is W which of the following is -true about the additional tension T produced in the wire(A) T-O C)T w(B) T =. W.(D)T > W

Why are MCBs used in place of ceramic fuses nowadays?

Question 10 How many 176Ω resistors (in parallel) are required to carry 5 A on a 220 V line?

21.A particle of mass 100 g is thrown verticallyupwards with a speed of 5 m/s, the work doneby the force of gravity during the time theparticle goes up is(A.I.E.E.E. 2006)(1)(2)-0.5 J(3)0.5J- 1.25 J1.25 J(4)

In the second stanza why has the narrator replaced the mirror with a lake? What is he/she trying to focus on?